return
{
[1] = {id=1,a={y1=1,y2=2,y3=3,},b={y1=21,y2=221,y3=23,},c={y1=31,y2=32,y3=33,},},
[2] = {id=2,a={y1=1,y2=2,y3=3,},b={y1=21,y2=221,y3=23,},c={y1=31,y2=32,y3=33,},},
}